TLE4270SNKSA1 Equivalent & Substitute Parts

Part Overview

The TLE4270SNKSA1 is a linear voltage regulator IC manufactured by Infineon Technologies, designed to deliver a fixed 5V output at 650mA with integrated protection features including over-current, over-temperature, over-voltage, reverse polarity, and short-circuit protection. The device operates across an input voltage range up to 42V with a maximum dropout voltage of 0.7V at 550mA, making it suitable for applications requiring stable regulated power in harsh thermal environments (-40°C to 150°C).

This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility with existing designs.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	650mA
Input Voltage (Max)	42V
Dropout Voltage (Max)	0.7V @ 550mA
Quiescent Current	1.5 mA
PSRR	54dB (100Hz)
Operating Temperature Range	-40°C to 150°C
Protection Features	Over Current, Over Temperature, Over Voltage, Reverse Polarity, Short Circuit, Transient Voltage
Control Features	Reset
Package Type	TO-220-5

Substitute Part Grouping Explanation

Substitution of the TLE4270SNKSA1 is determined by strict equivalence across the following electrical parameters:

Fixed output voltage of 5V
Output current capability of 650mA
Maximum input voltage rating of 42V
Dropout voltage specification of 0.7V @ 550mA
Quiescent current of 1.5 mA
PSRR of 54dB (100Hz)
Operating temperature range of -40°C to 150°C
Identical protection feature set (Over Current, Over Temperature, Over Voltage, Reverse Polarity, Short Circuit, Transient Voltage)
Reset control functionality

The TLE42702GATMA1 qualifies as a manufacturer-recommended substitute based on complete electrical parameter equivalence. The primary distinction is packaging: the original uses through-hole TO-220-5 mounting, while the substitute employs surface-mount TO-263-5 packaging. This substitution requires PCB redesign for mounting compatibility.

Parameter Comparison

Parameter	TLE4270SNKSA1	TLE42702GATMA1
Manufacturer	Infineon Technologies	Infineon Technologies
Output Voltage (Fixed)	5V	5V
Output Current	650mA	650mA
Input Voltage (Max)	42V	42V
Dropout Voltage (Max)	0.7V @ 550mA	0.7V @ 550mA
Quiescent Current	1.5 mA	1.5 mA
PSRR	54dB (100Hz)	54dB (100Hz)
Operating Temperature Range	-40°C to 150°C	-40°C to 150°C
Protection Features	Over Current, Over Temperature, Over Voltage, Reverse Polarity, Short Circuit, Transient Voltage	Over Current, Over Temperature, Over Voltage, Reverse Polarity, Short Circuit, Transient Voltage
Control Features	Reset	Reset
Mounting Type	Through Hole	Surface Mount
Package / Case	TO-220-5	TO-263-6, D2PAK (5 Leads + Tab)
Product Status	Discontinued at DiGi Electronics	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Grade	Standard	Automotive
Qualification	Not specified	AEC-Q100

Engineering Selection Recommendations

The TLE42702GATMA1 is the manufacturer-recommended substitute for the discontinued TLE4270SNKSA1. Both devices deliver identical electrical performance across all specified parameters, ensuring functional compatibility in regulated power supply applications.

The substitute offers two significant advantages: active product status with established supply chain availability, and ROHS3 compliance with automotive-grade qualification (AEC-Q100). These attributes support long-term design sustainability and regulatory alignment.

The primary design consideration is packaging transition from through-hole TO-220-5 to surface-mount TO-263-5 configuration. This substitution requires PCB layout modification and revalidation of thermal management characteristics, as the TO-263 package presents different thermal dissipation pathways compared to the through-hole TO-220 form factor.

Frequently Asked Questions (FAQ)

Q: What electrical parameters must match for substitution of the TLE4270SNKSA1?

A: The substitute must maintain 5V fixed output voltage, 650mA output current, 42V maximum input voltage, 0.7V dropout voltage at 550mA, 1.5 mA quiescent current, 54dB PSRR at 100Hz, -40°C to 150°C operating range, and identical protection features (Over Current, Over Temperature, Over Voltage, Reverse Polarity, Short Circuit, Transient Voltage) with Reset control functionality.

Q: Can the TLE42702GATMA1 be used as a direct pin-for-pin replacement?

A: No. While electrically equivalent, the TLE42702GATMA1 uses surface-mount TO-263 packaging versus the through-hole TO-220-5 package of the original. PCB redesign is required for mounting compatibility.

Q: What are the thermal management differences between the two packages?

A: The TO-220-5 through-hole package and TO-263-5 surface-mount package employ different thermal dissipation mechanisms. Thermal analysis specific to your PCB layout and cooling strategy is necessary to confirm equivalent thermal performance.

Q: Does the substitute meet current regulatory requirements?

A: The TLE42702GATMA1 is ROHS3 compliant and carries AEC-Q100 automotive qualification, providing enhanced regulatory alignment compared to the non-compliant original part.

Q: Is the substitute available in production quantities?

A: Yes. The TLE42702GATMA1 maintains active product status with 2400 pieces available in inventory, ensuring supply chain continuity.

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